MEM09003B – Prepare basic engineering drawings First Published October 2014 This work is copyright. Any inquiries about the use of this material should be directed to the publisher. Edition 1 – October 2014 BlackLine Design Page | 1 4th October 2014 MEM09003B – Prepare basic engineering drawings Conditions of Use: Unit Resource Manual Manufacturing Skills Australia Courses This Student’s Manual has been developed by BlackLine Design for use in the Manufacturing Skills Australia Courses. All rights reserved. No part of this publication may be printed or transmitted in any form by any means without the explicit permission of the writer. Statutory copyright restrictions apply to this material in digital and hard copy. Copyright BlackLine Design 2014 BlackLine Design Page | 2 4th October 2014 MEM09003B – Prepare basic engineering drawings Aims of the Competency Unit: This unit covers identifying the drawing requirements, preparing or making changes to engineering drawings, preparing an engineering parts list and issuing the drawings Unit Hours: 72 Hours Prerequisites: MEM09002B Interpret technical drawing. BlackLine Design Page | 3 4th October 2014 MEM09003B – Prepare basic engineering drawings Elements and Performance Criteria 1. Identify drawing 1.1 Requirements and purpose of drawing are determined requirements from customer and/or work specification and associated documents. 1.2 All data necessary to produce the drawing is identified and collected. 1.3 Drawing requirements are confirmed with relevant personnel and timeframes for completion are established. 2. Comply with 2.1 Drafting equipment is selected appropriate to the environmental drawing method chosen. regulations. 2.2 Drafting principles are applied to produce a drawing that is consistent with standard operating procedures within the enterprise. 2.3 All work is undertaken safely and to prescribed procedure. 2.4 Completed drawing is approved in accordance with standard operating procedures. 3. Prepare 3.1 Components parts are identified and organised by engineering parts component type and/or in accordance with list organisation/customer requirements. 4. Issue drawing 4.1 Drawings and or parts lists records are completed in accordance with standard operating procedures. 4.2 Approved drawings and or parts lists are copied and issued to relevant personnel in accordance with standard operating procedures. 4.3 Approved drawings and or parts lists are stored and catalogued in accordance with standard operating procedures. BlackLine Design Page | 4 4th October 2014 MEM09003B – Prepare basic engineering drawings Required Skills and Knowledge Required skills include: obtaining all relevant job requirements, data/information and specifications necessary to produce the drawing in accordance with workplace procedures using drafting equipment appropriate to the drawing method chosen producing/changing the drawing to conform with the relevant standard undertaking all work safely and in accordance with workplace procedures checking the completed drawing in accordance with standard operating procedures producing the component parts list with part name, description of part, material specification or part number, quantities and all other details specified by the customer and/or organisational procedures recording completed drawings and or parts lists in accordance with standard operating procedures where appropriate, copying and issuing approved drawings and or parts lists in accordance with standard operating procedures handling and storing the approved drawings and or parts lists in accordance with standard operating procedures reading, interpreting and following information on written job instructions, specifications, standard operating procedures, charts, lists, drawings and other applicable reference documents planning and sequencing operations checking and clarifying task related information undertaking numerical operations, geometry and calculations/formulae within the scope of this unit Required knowledge includes: requirements and purpose of the drawing to be produced requirements and purpose of the engineering parts list sources of relevant data/ information timeframe for completion of the drawing(s) person(s) who can confirm drawing requirements method of drawing preparation the reasons for selecting the chosen drawing method procedures for producing an initial drawing procedures for changing an existing drawing drafting principles to be applied to the production/changing of a drawing standards to which the drawing is to be produced procedures for checking drawings the persons responsible for checking and approving drawings consequences of inappropriate/incomplete components parts lists procedures and reasons for recording completed drawings and or parts lists procedures for copying approved drawings and or parts lists procedures for issuing approved drawings and or parts lists the personnel to whom copies of approved drawings and or parts lists can be issued procedures for filing approved drawings and or parts lists procedures for safe handling and storage of drawings and or parts lists consequences of inappropriate handling and storage of approved drawings and or parts lists BlackLine Design Page | 5 4th October 2014 MEM09003B – Prepare basic engineering drawings Lesson Program: Unit hour unit and is divided into the following program. BlackLine Design Page | 6 4th October 2014 MEM09003B – Prepare basic engineering drawings BlackLine Design Page | 7 4th October 2014 MEM09003B – Prepare basic engineering drawings BlackLine Design Page | 8 4th October 2014 MEM09003B – Prepare basic engineering drawings BlackLine Design Page | 9 4th October 2014 MEM09003B – Prepare basic engineering drawings Topic 1 - Drafting Basics Topic 1 – Drafting Basics: Required Skills: Use different line constructions to identify features on an orthogonal view Produce a simple drawing without notations and dimensions in Orthogonal Projection. Required Knowledge: The Australian Standard controlling the preparation and presentation of all drawings in Australia. The difference between First and Third Angle Projection. Types of drawings used in engineering and manufacturing. Items of manual drafting equipment. Types of line construction and line widths used in preparing a drawing. 1.1 Introduction to Drawings: The preparation of plans for the construction of ships, buildings and machines is as old as written history. Original drawings were carved on rock or sketched onto papyrus. One of the oldest drawings of an engineering component is a cave painting of a bow in Castellon, France in about 8000BC. As civilisation grew and the skills became more advanced, plans were produced on other mediums such and bark and paper using a variety of instruments to assist in creating better quality drawings. The image shown in Error! Reference source not found. shows a portion of the clay plans of a six-room building, a sanctuary or a private house and are part of the Gudea cylinders dating about 4200 years ago, on which is written in cuneiform a Sumerian myth called the Building of Ningursu's temple. A new material, papyrus, was developed for storing written history, documents and plans. Error! Reference source not found. shows the remains of a papyrus documenting mathematical formula dating from about 3500 years past. As technology improved, so did the media on which the documents and plans were recorded. About 2500 years ago, parchment or vellim was created using dried hides and skins of goats and lambs. Figure 1.1 shows the plans drawn on parchment for the monastery at Saint Gall, Switzerland, which are now about 1200 years old. In China, the origins for the use of silk and the development of paper can development of paper can be traced back 2200 years but by the 1600’s paper and canvas was being used extensively for art and the recording of engineering plans. Leonardo De Vinci was a major innovator in designs and while many did not work at the time, it has been proven that with modern light-weight materials, the inventions did work. Figure 1.2 shows the drawing for an Armoured Tank drawn in about 1500. BlackLine Design Page | 10 4th October 2014 MEM09003B – Prepare basic engineering drawings Figure 1.1 Figure 1.2 During the Industrial Age drawings became elaborate and were prepared by qualified architects, engineers and draughtsmen. By 1833 Stephenson produced a drawing of his steam engine named the “Rocket” and shown in Error! Reference source not found. while Error! Reference source not found. shows Robinson’s New York Utility plan complete with the sewer, gas, water services and ventilation. Modern drawings may consist of one or more views and include all general and toleranced dimensions, notations, welding symbols, machining symbols, surface finish and geometric tolerancing symbols to produce accurate components, assemblies and constructions. The methods of drafting have also changed, seldom are drawings created using manual drafting equipment on drawing boards; modern detail, assembly and construction drawings are produced using complex Computer Aided Drafting (CAD) programs which produce both 2D plotted/printed drawings and 3D models. Figure 1.3 Figure 1.4 Drawings were once created by the designer with little thought to conformity or any standard; some drawings had some dimensions or sizes however many drawings showed the basic shape or overall sizes and the actual details were left up to the engineer and supervisor on the job. BlackLine Design Page | 11 4th